A BW-Extended Multi-Band Receiver with High-Order N-Path Filtering at RF Front-End and BB Achieving 200MHz BW and 36.5dBm OB-IIP₃

This work presents a radio-frequency (RF) blocker-tolerant multi-band (0.5 to 2GHz) receiver to achieve both wide passband bandwidth (BW) and sharp out-of-band (OB) attenuation at near-by frequency. At RF front-end, it features the combination of the 4<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup>-order N-path low-noise transconductance amplifier (LNTA) and the bottom-plate N-path filter, while at baseband (BB) it introduces the 3<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup>-order N-path lowpass filter and 2<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup>-order BB trans-impedance amplifier (TIA). Besides, a negative-feedback frequency-translational loop is created to achieve the input-impedance matching condition. Designed in 65nm CMOS technology, our receiver achieves -220dB/decade near-by roll-off slope for a 200MHz RF-BW at 2GHz. With 3xRF-BW offset, the receiver achieves 36.5dBm OB-IIP3. The noise figure (NF) is simulated from 2.4 to 3.8dB and the power consumption is 27.6 to 37.8mW. The chip area is 0.68mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>.